1 files changed, 39 insertions, 0 deletions
diff --git a/cask/src/cask/router/Runtime.scala b/cask/src/cask/router/Runtime.scala
new file mode 100644
index 0000000..4fbbb48
--- /dev/null
+++ b/cask/src/cask/router/Runtime.scala
@@ -0,0 +1,39 @@
+package cask.router
+
+object Runtime{
+
+  def tryEither[T](t: => T, error: Throwable => Result.ParamError) = {
+    try Right(t)
+    catch{ case e: Throwable => Left(error(e))}
+  }
+
+
+  def validate(args: Seq[Either[Seq[Result.ParamError], Any]]): Result[Seq[Any]] = {
+    val lefts = args.collect{case Left(x) => x}.flatten
+
+    if (lefts.nonEmpty) Result.Error.InvalidArguments(lefts)
+    else {
+      val rights = args.collect{case Right(x) => x}
+      Result.Success(rights)
+    }
+  }
+
+  def makeReadCall[I, C](dict: Map[String, I],
+                         ctx: C,
+                         default: => Option[Any],
+                         arg: ArgSig[I, _, _, C]) = {
+    arg.reads.arity match{
+      case 0 =>
+        tryEither(
+          arg.reads.read(ctx, arg.name, null.asInstanceOf[I]), Result.ParamError.DefaultFailed(arg, _)).left.map(Seq(_))
+      case 1 =>
+        dict.get(arg.name) match{
+          case None =>
+            tryEither(default.get, Result.ParamError.DefaultFailed(arg, _)).left.map(Seq(_))
+
+          case Some(x) =>
+            tryEither(arg.reads.read(ctx, arg.name, x), Result.ParamError.Invalid(arg, x.toString, _)).left.map(Seq(_))
+        }
+    }
+  }
+}
+\ No newline at end of file